diff --git a/test/regress/test_escapes.cpp b/test/regress/test_escapes.cpp
index 567bf43a..2511fcfe 100644
--- a/test/regress/test_escapes.cpp
+++ b/test/regress/test_escapes.cpp
@@ -156,10 +156,10 @@ void test_assertion_escapes()
    TEST_REGEX_SEARCH("\\R", perl, "foo\rbar", match_default, make_array(3, 4, -2, -2));
    TEST_REGEX_SEARCH("\\R", perl, "foo\r\nbar", match_default, make_array(3, 5, -2, -2));
    TEST_REGEX_SEARCH("(?x) abc \\R", perl, "abc\r\nbar", match_default, make_array(0, 5, -2, -2));
-   TEST_REGEX_SEARCH("(?x) abc \\R", perl, "abc\x0A" "bar", match_default, make_array(0, 4, -2, -2));
-   TEST_REGEX_SEARCH("(?x) abc \\R", perl, "abc\x0B" "bar", match_default, make_array(0, 4, -2, -2));
-   TEST_REGEX_SEARCH("(?x) abc \\R", perl, "abc\x0C" "bar", match_default, make_array(0, 4, -2, -2));
-   TEST_REGEX_SEARCH("(?x) abc \\R", perl, "abc\x85" "bar", match_default, make_array(0, 4, -2, -2));
+   TEST_REGEX_SEARCH("(?x) abc \\R", perl, "abc\012bar", match_default, make_array(0, 4, -2, -2));
+   TEST_REGEX_SEARCH("(?x) abc \\R", perl, "abc\013bar", match_default, make_array(0, 4, -2, -2));
+   TEST_REGEX_SEARCH("(?x) abc \\R", perl, "abc\013bar", match_default, make_array(0, 4, -2, -2));
+   TEST_REGEX_SEARCH("(?x) abc \\R", perl, "abc\205bar", match_default, make_array(0, 4, -2, -2));
    // see if \u works:
    const wchar_t* w = L"\u2028";
    if(*w == 0x2028u)